Yay I broke something too. I never document pedal repairs for some reason so I guess now’s the time.
I played this pedal a few years ago and thought it ruled. I never got one however because it’s totally expensive. I saw one used for cheap and impulsively bought it, and broke it in the first 10 seconds.
I used a DC adapter that plugs into the wall but it was a variable supply one. You can choose between 3, 4.5, 6, 7.5, 9 and 12 volts. I had it on 12V by accident. Doesn’t seem too bad. Unfortunately, by reading the voltages with a meter the actual outputs are 5, 6.75, 8.75, 10.85, 12.9, and 18V. I fried my pedal by giving it double voltage with this cheap adapter damn.
Ok time to look for things that got too much voltage. Everything looks normal. Ok, maybe plug it in again and probe around. No voltages on any of the IC leads. Ok that won’t work.
It is a TC1044SCPA. Datasheet says it is a charge pump DC to DC voltage converter, basically just inverting the 9VDC from adapter to -9V for some section of the circuit. It operates with an input voltage anywhere between 1.5-12VDC and it’s maximum input voltage rating is 13VDC! Ok so this is probably what burned out after plugging it in for a few seconds. All the caps were fortunately 25V rating so they survived the 18V mistake. I broke a 1N127 glass diode in my fumbling and had to replace that as well. I looked around unsuccessfully for a little and eventually found that a 1N3070TR is an equivalent. Nothing else was damaged so it is all back in action. Fortunately pretty painless troubleshoot.
Look how they got those old carbon comp resistors in there. Wonder why?